Question
Dennis,
λαὸς is singular but its adjective ἔκθαμβοι is plural, which makes sense to me as ‘the people’ is a plural idea. Is this common in the GNT? Does your functional grammar database reveal other occurrences?
Acts 3:11 (NA27 with Mounce-Koivisto Morphology)
Κρατοῦντος δὲ αὐτοῦ τὸν Πέτρον καὶ τὸν Ἰωάννην συνέδραμεν πᾶς ὁ λαὸς πρὸς αὐτοὺς ἐπὶ τῇ στοᾷ τῇ καλουμένῃ Σολομῶντος ἔκθαμβοι.
Response
I had not coded that verse in the database. In Mark 3:8 πλῆθος πολύ, ἀκούοντες uses a plural participle for a singular subject and verb. It is somewhat similar in using the natural plural of a collective singular noun. I also find 6 other instances where the plural number is used with singular nouns, but they are not predicate nominatives as here in Acts 3:11. The Grammatical Commentary database keeps track of number agreement exceptions (17 kinds). I have identified over 200 in the quarter of the GNT I have coded. The most common are the conjuncts and tack-on subjects and the regular singular verbs with plural neuter subjects.